Just step on the ground in France, the French are waiting to speak in French, for there are very demanding with his language. If you do not, no problem, because they are accustomed to receiving tourists from all over the world. What I should be aware of is the greeting, an important sign of education that is part of the traditions of France.
For example, you have to say “Good morning, sir / madam” (“Bonjour Madame / Monsieur”) and possibly a handshake. The “hello” or in French “Salut” is reserved for greetings between friends or confidants. In France they are very polite, and that while in this country should pay attention to good manners, you will be noticed!